Evolution with stellar mass of the cosmic SFRD at 4 < z < 5. Top left: fiducial SMF used in our calculations is represented by the gray line and shaded region. This is the combination of a Schechter and power-law function fit to the SMF of Weaver et al. (2023, gray and black circles). A Schechter function fit to these data points is shown by the gray dotted line. Bottom left: cosmic SFRD (thick black line) and dust-attenuated SFRD (red line) above a given stellar mass, as inferred using the fiducial SMF. The dotted gray and red lines present the same quantities but using a simple Schechter SMF in our calculations. Top right: fraction of the M_* > 10⁸ M_⊙ SFRD (gray histogram) and dust-attenuated SFRD (red histogram) that is attributed to a given stellar mass bin. Bottom right: fraction of the cosmic SFRD above a given stellar mass that is dust-attenuated (red region) and unattenuated (blue region). The dotted gray line present the same quantity but using a simple Schechter SMF in our calculations. In all panels, the vertical line represents the 0.03 × M^⋆ lower integration limits commonly used to infer the “total” cosmic SFRD (e.g., Madau & Dickinson 2014). All quantities in the bottom-left, top-right, and bottom-right panels were calculated using our fiducial SMF, IRX–M_*, MS relations. The propagation of the 1-σ uncertainties on the SMF and the IRX–M_* relation are represented by shaded regions. The uncertainties on the MS would move the black and red lines of the bottom-left panel up and down by 0.15 dex, but would have no effect on the other quantities displayed in this figure.